[libvirt] [PATCH 06/12] qemu: Move qemuNetworkIfaceConnect to qemu_interface.c and rename
John Ferlan
jferlan at redhat.com
Mon Feb 15 19:37:20 UTC 2016
Move the misplaced function from qemu_command.c to qemu_interface.c
since it's closer in functionality there and had less to do with building
the command line.
Rename function to qemuInterfaceNetworkConnect and modify callers.
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
po/POTFILES.in | 1 +
src/qemu/qemu_command.c | 213 +------------------------------------------
src/qemu/qemu_command.h | 6 --
src/qemu/qemu_hotplug.c | 4 +-
src/qemu/qemu_interface.c | 224 ++++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_interface.h | 6 ++
6 files changed, 235 insertions(+), 219 deletions(-)
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 4d82a8f..0ca9757 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -128,6 +128,7 @@ src/qemu/qemu_domain.c
src/qemu/qemu_driver.c
src/qemu/qemu_hostdev.c
src/qemu/qemu_hotplug.c
+src/qemu/qemu_interface.c
src/qemu/qemu_migration.c
src/qemu/qemu_monitor.c
src/qemu/qemu_monitor_json.c
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index be61b21..4ed3349 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -29,7 +29,6 @@
#include "qemu_interface.h"
#include "cpu/cpu.h"
#include "dirname.h"
-#include "passfd.h"
#include "viralloc.h"
#include "virlog.h"
#include "virarch.h"
@@ -153,214 +152,6 @@ VIR_ENUM_IMPL(qemuNumaPolicy, VIR_DOMAIN_NUMATUNE_MEM_LAST,
"preferred",
"interleave");
-/**
- * qemuCreateInBridgePortWithHelper:
- * @cfg: the configuration object in which the helper name is looked up
- * @brname: the bridge name
- * @ifname: the returned interface name
- * @macaddr: the returned MAC address
- * @tapfd: file descriptor return value for the new tap device
- * @flags: OR of virNetDevTapCreateFlags:
-
- * VIR_NETDEV_TAP_CREATE_VNET_HDR
- * - Enable IFF_VNET_HDR on the tap device
- *
- * This function creates a new tap device on a bridge using an external
- * helper. The final name for the bridge will be stored in @ifname.
- *
- * Returns 0 in case of success or -1 on failure
- */
-static int qemuCreateInBridgePortWithHelper(virQEMUDriverConfigPtr cfg,
- const char *brname,
- char **ifname,
- int *tapfd,
- unsigned int flags)
-{
- virCommandPtr cmd;
- char *errbuf = NULL, *cmdstr = NULL;
- int pair[2] = { -1, -1 };
-
- if ((flags & ~VIR_NETDEV_TAP_CREATE_VNET_HDR) != VIR_NETDEV_TAP_CREATE_IFUP)
- return -1;
-
- if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) < 0) {
- virReportSystemError(errno, "%s", _("failed to create socket"));
- return -1;
- }
-
- if (!virFileIsExecutable(cfg->bridgeHelperName)) {
- virReportSystemError(errno, _("'%s' is not a suitable bridge helper"),
- cfg->bridgeHelperName);
- return -1;
- }
-
- cmd = virCommandNew(cfg->bridgeHelperName);
- if (flags & VIR_NETDEV_TAP_CREATE_VNET_HDR)
- virCommandAddArgFormat(cmd, "--use-vnet");
- virCommandAddArgFormat(cmd, "--br=%s", brname);
- virCommandAddArgFormat(cmd, "--fd=%d", pair[1]);
- virCommandSetErrorBuffer(cmd, &errbuf);
- virCommandDoAsyncIO(cmd);
- virCommandPassFD(cmd, pair[1],
- VIR_COMMAND_PASS_FD_CLOSE_PARENT);
- virCommandClearCaps(cmd);
-#ifdef CAP_NET_ADMIN
- virCommandAllowCap(cmd, CAP_NET_ADMIN);
-#endif
- if (virCommandRunAsync(cmd, NULL) < 0) {
- *tapfd = -1;
- goto cleanup;
- }
-
- do {
- *tapfd = recvfd(pair[0], 0);
- } while (*tapfd < 0 && errno == EINTR);
-
- if (*tapfd < 0) {
- char ebuf[1024];
- char *errstr = NULL;
-
- if (!(cmdstr = virCommandToString(cmd)))
- goto cleanup;
- virCommandAbort(cmd);
-
- if (errbuf && *errbuf &&
- virAsprintf(&errstr, "\nstderr=%s", errbuf) < 0)
- goto cleanup;
-
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("%s: failed to communicate with bridge helper: %s%s"),
- cmdstr, virStrerror(errno, ebuf, sizeof(ebuf)),
- errstr ? errstr : "");
- VIR_FREE(errstr);
- goto cleanup;
- }
-
- if (virNetDevTapGetName(*tapfd, ifname) < 0 ||
- virCommandWait(cmd, NULL) < 0) {
- VIR_FORCE_CLOSE(*tapfd);
- *tapfd = -1;
- }
-
- cleanup:
- VIR_FREE(cmdstr);
- VIR_FREE(errbuf);
- virCommandFree(cmd);
- VIR_FORCE_CLOSE(pair[0]);
- return *tapfd < 0 ? -1 : 0;
-}
-
-/* qemuNetworkIfaceConnect - *only* called if actualType is
- * VIR_DOMAIN_NET_TYPE_NETWORK or VIR_DOMAIN_NET_TYPE_BRIDGE (i.e. if
- * the connection is made with a tap device connecting to a bridge
- * device)
- */
-int
-qemuNetworkIfaceConnect(virDomainDefPtr def,
- virQEMUDriverPtr driver,
- virDomainNetDefPtr net,
- int *tapfd,
- size_t *tapfdSize)
-{
- const char *brname;
- int ret = -1;
- unsigned int tap_create_flags = VIR_NETDEV_TAP_CREATE_IFUP;
- bool template_ifname = false;
- virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
- const char *tunpath = "/dev/net/tun";
-
- if (net->backend.tap) {
- tunpath = net->backend.tap;
- if (!(virQEMUDriverIsPrivileged(driver))) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("cannot use custom tap device in session mode"));
- goto cleanup;
- }
- }
-
- if (!(brname = virDomainNetGetActualBridgeName(net))) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Missing bridge name"));
- goto cleanup;
- }
-
- if (!net->ifname ||
- STRPREFIX(net->ifname, VIR_NET_GENERATED_PREFIX) ||
- strchr(net->ifname, '%')) {
- VIR_FREE(net->ifname);
- if (VIR_STRDUP(net->ifname, VIR_NET_GENERATED_PREFIX "%d") < 0)
- goto cleanup;
- /* avoid exposing vnet%d in getXMLDesc or error outputs */
- template_ifname = true;
- }
-
- if (net->model && STREQ(net->model, "virtio"))
- tap_create_flags |= VIR_NETDEV_TAP_CREATE_VNET_HDR;
-
- if (virQEMUDriverIsPrivileged(driver)) {
- if (virNetDevTapCreateInBridgePort(brname, &net->ifname, &net->mac,
- def->uuid, tunpath, tapfd, *tapfdSize,
- virDomainNetGetActualVirtPortProfile(net),
- virDomainNetGetActualVlan(net),
- tap_create_flags) < 0) {
- virDomainAuditNetDevice(def, net, tunpath, false);
- goto cleanup;
- }
- if (virDomainNetGetActualBridgeMACTableManager(net)
- == VIR_NETWORK_BRIDGE_MAC_TABLE_MANAGER_LIBVIRT) {
- /* libvirt is managing the FDB of the bridge this device
- * is attaching to, so we need to turn off learning and
- * unicast_flood on the device to prevent the kernel from
- * adding any FDB entries for it. We will add add an fdb
- * entry ourselves (during qemuInterfaceStartDevices(),
- * using the MAC address from the interface config.
- */
- if (virNetDevBridgePortSetLearning(brname, net->ifname, false) < 0)
- goto cleanup;
- if (virNetDevBridgePortSetUnicastFlood(brname, net->ifname, false) < 0)
- goto cleanup;
- }
- } else {
- if (qemuCreateInBridgePortWithHelper(cfg, brname,
- &net->ifname,
- tapfd, tap_create_flags) < 0) {
- virDomainAuditNetDevice(def, net, tunpath, false);
- goto cleanup;
- }
- /* qemuCreateInBridgePortWithHelper can only create a single FD */
- if (*tapfdSize > 1) {
- VIR_WARN("Ignoring multiqueue network request");
- *tapfdSize = 1;
- }
- }
-
- virDomainAuditNetDevice(def, net, tunpath, true);
-
- if (cfg->macFilter &&
- ebtablesAddForwardAllowIn(driver->ebtables,
- net->ifname,
- &net->mac) < 0)
- goto cleanup;
-
- if (net->filter &&
- virDomainConfNWFilterInstantiate(def->uuid, net) < 0) {
- goto cleanup;
- }
-
- ret = 0;
-
- cleanup:
- if (ret < 0) {
- size_t i;
- for (i = 0; i < *tapfdSize && tapfd[i] >= 0; i++)
- VIR_FORCE_CLOSE(tapfd[i]);
- if (template_ifname)
- VIR_FREE(net->ifname);
- }
- virObjectUnref(cfg);
-
- return ret;
-}
-
static bool
qemuDomainSupportsNicdev(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
@@ -8423,8 +8214,8 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
memset(tapfd, -1, tapfdSize * sizeof(tapfd[0]));
- if (qemuNetworkIfaceConnect(def, driver, net,
- tapfd, &tapfdSize) < 0)
+ if (qemuInterfaceNetworkConnect(def, driver, net,
+ tapfd, &tapfdSize) < 0)
goto cleanup;
} else if (actualType == VIR_DOMAIN_NET_TYPE_DIRECT) {
tapfdSize = net->driver.virtio.queues;
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 2201c27..5fb91e5 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -223,12 +223,6 @@ char *qemuBuildHubDevStr(virDomainDefPtr def,
char *qemuBuildRedirdevDevStr(virDomainDefPtr def,
virDomainRedirdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
-int qemuNetworkIfaceConnect(virDomainDefPtr def,
- virQEMUDriverPtr driver,
- virDomainNetDefPtr net,
- int *tapfd,
- size_t *tapfdSize)
- ATTRIBUTE_NONNULL(2);
int qemuOpenVhostNet(virDomainDefPtr def,
virDomainNetDefPtr net,
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index bfc771d..e635fab 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -922,8 +922,8 @@ int qemuDomainAttachNetDevice(virConnectPtr conn,
if (VIR_ALLOC_N(vhostfd, vhostfdSize) < 0)
goto cleanup;
memset(vhostfd, -1, sizeof(*vhostfd) * vhostfdSize);
- if (qemuNetworkIfaceConnect(vm->def, driver, net,
- tapfd, &tapfdSize) < 0)
+ if (qemuInterfaceNetworkConnect(vm->def, driver, net,
+ tapfd, &tapfdSize) < 0)
goto cleanup;
iface_connected = true;
if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, vhostfd, &vhostfdSize) < 0)
diff --git a/src/qemu/qemu_interface.c b/src/qemu/qemu_interface.c
index dbfdf0f..2584236 100644
--- a/src/qemu/qemu_interface.c
+++ b/src/qemu/qemu_interface.c
@@ -26,14 +26,22 @@
#include "network_conf.h"
#include "domain_audit.h"
+#include "domain_nwfilter.h"
#include "qemu_interface.h"
+#include "passfd.h"
#include "viralloc.h"
+#include "virlog.h"
+#include "virstring.h"
#include "virnetdev.h"
#include "virnetdevtap.h"
#include "virnetdevmacvlan.h"
#include "virnetdevbridge.h"
#include "virnetdevvportprofile.h"
+#define VIR_FROM_THIS VIR_FROM_QEMU
+
+VIR_LOG_INIT("qemu.qemu_interface");
+
/**
* qemuInterfaceStartDevice:
* @net: net device to start
@@ -276,3 +284,219 @@ qemuInterfacePhysicalConnect(virDomainDefPtr def,
virObjectUnref(cfg);
return ret;
}
+
+
+/**
+ * qemuCreateInBridgePortWithHelper:
+ * @cfg: the configuration object in which the helper name is looked up
+ * @brname: the bridge name
+ * @ifname: the returned interface name
+ * @macaddr: the returned MAC address
+ * @tapfd: file descriptor return value for the new tap device
+ * @flags: OR of virNetDevTapCreateFlags:
+
+ * VIR_NETDEV_TAP_CREATE_VNET_HDR
+ * - Enable IFF_VNET_HDR on the tap device
+ *
+ * This function creates a new tap device on a bridge using an external
+ * helper. The final name for the bridge will be stored in @ifname.
+ *
+ * Returns 0 in case of success or -1 on failure
+ */
+static int
+qemuCreateInBridgePortWithHelper(virQEMUDriverConfigPtr cfg,
+ const char *brname,
+ char **ifname,
+ int *tapfd,
+ unsigned int flags)
+{
+ virCommandPtr cmd;
+ char *errbuf = NULL, *cmdstr = NULL;
+ int pair[2] = { -1, -1 };
+
+ if ((flags & ~VIR_NETDEV_TAP_CREATE_VNET_HDR) != VIR_NETDEV_TAP_CREATE_IFUP)
+ return -1;
+
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) < 0) {
+ virReportSystemError(errno, "%s", _("failed to create socket"));
+ return -1;
+ }
+
+ if (!virFileIsExecutable(cfg->bridgeHelperName)) {
+ virReportSystemError(errno, _("'%s' is not a suitable bridge helper"),
+ cfg->bridgeHelperName);
+ return -1;
+ }
+
+ cmd = virCommandNew(cfg->bridgeHelperName);
+ if (flags & VIR_NETDEV_TAP_CREATE_VNET_HDR)
+ virCommandAddArgFormat(cmd, "--use-vnet");
+ virCommandAddArgFormat(cmd, "--br=%s", brname);
+ virCommandAddArgFormat(cmd, "--fd=%d", pair[1]);
+ virCommandSetErrorBuffer(cmd, &errbuf);
+ virCommandDoAsyncIO(cmd);
+ virCommandPassFD(cmd, pair[1],
+ VIR_COMMAND_PASS_FD_CLOSE_PARENT);
+ virCommandClearCaps(cmd);
+#ifdef CAP_NET_ADMIN
+ virCommandAllowCap(cmd, CAP_NET_ADMIN);
+#endif
+ if (virCommandRunAsync(cmd, NULL) < 0) {
+ *tapfd = -1;
+ goto cleanup;
+ }
+
+ do {
+ *tapfd = recvfd(pair[0], 0);
+ } while (*tapfd < 0 && errno == EINTR);
+
+ if (*tapfd < 0) {
+ char ebuf[1024];
+ char *errstr = NULL;
+
+ if (!(cmdstr = virCommandToString(cmd)))
+ goto cleanup;
+ virCommandAbort(cmd);
+
+ if (errbuf && *errbuf &&
+ virAsprintf(&errstr, "\nstderr=%s", errbuf) < 0)
+ goto cleanup;
+
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("%s: failed to communicate with bridge helper: %s%s"),
+ cmdstr, virStrerror(errno, ebuf, sizeof(ebuf)),
+ errstr ? errstr : "");
+ VIR_FREE(errstr);
+ goto cleanup;
+ }
+
+ if (virNetDevTapGetName(*tapfd, ifname) < 0 ||
+ virCommandWait(cmd, NULL) < 0) {
+ VIR_FORCE_CLOSE(*tapfd);
+ *tapfd = -1;
+ }
+
+ cleanup:
+ VIR_FREE(cmdstr);
+ VIR_FREE(errbuf);
+ virCommandFree(cmd);
+ VIR_FORCE_CLOSE(pair[0]);
+ return *tapfd < 0 ? -1 : 0;
+}
+
+/* qemuInterfaceNetworkConnect:
+ * @def: the definition of the VM
+ * @driver: qemu driver data
+ * @net: pointer to the VM's interface description
+ * @tapfd: array of file descriptor return value for the new device
+ * @tapfdsize: number of file descriptors in @tapfd
+ *
+ * Called *only* called if actualType is VIR_DOMAIN_NET_TYPE_NETWORK or
+ * VIR_DOMAIN_NET_TYPE_BRIDGE (i.e. if the connection is made with a tap
+ * device connecting to a bridge device)
+ */
+int
+qemuInterfaceNetworkConnect(virDomainDefPtr def,
+ virQEMUDriverPtr driver,
+ virDomainNetDefPtr net,
+ int *tapfd,
+ size_t *tapfdSize)
+{
+ const char *brname;
+ int ret = -1;
+ unsigned int tap_create_flags = VIR_NETDEV_TAP_CREATE_IFUP;
+ bool template_ifname = false;
+ virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
+ const char *tunpath = "/dev/net/tun";
+
+ if (net->backend.tap) {
+ tunpath = net->backend.tap;
+ if (!(virQEMUDriverIsPrivileged(driver))) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("cannot use custom tap device in session mode"));
+ goto cleanup;
+ }
+ }
+
+ if (!(brname = virDomainNetGetActualBridgeName(net))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Missing bridge name"));
+ goto cleanup;
+ }
+
+ if (!net->ifname ||
+ STRPREFIX(net->ifname, VIR_NET_GENERATED_PREFIX) ||
+ strchr(net->ifname, '%')) {
+ VIR_FREE(net->ifname);
+ if (VIR_STRDUP(net->ifname, VIR_NET_GENERATED_PREFIX "%d") < 0)
+ goto cleanup;
+ /* avoid exposing vnet%d in getXMLDesc or error outputs */
+ template_ifname = true;
+ }
+
+ if (net->model && STREQ(net->model, "virtio"))
+ tap_create_flags |= VIR_NETDEV_TAP_CREATE_VNET_HDR;
+
+ if (virQEMUDriverIsPrivileged(driver)) {
+ if (virNetDevTapCreateInBridgePort(brname, &net->ifname, &net->mac,
+ def->uuid, tunpath, tapfd, *tapfdSize,
+ virDomainNetGetActualVirtPortProfile(net),
+ virDomainNetGetActualVlan(net),
+ tap_create_flags) < 0) {
+ virDomainAuditNetDevice(def, net, tunpath, false);
+ goto cleanup;
+ }
+ if (virDomainNetGetActualBridgeMACTableManager(net)
+ == VIR_NETWORK_BRIDGE_MAC_TABLE_MANAGER_LIBVIRT) {
+ /* libvirt is managing the FDB of the bridge this device
+ * is attaching to, so we need to turn off learning and
+ * unicast_flood on the device to prevent the kernel from
+ * adding any FDB entries for it. We will add add an fdb
+ * entry ourselves (during qemuInterfaceStartDevices(),
+ * using the MAC address from the interface config.
+ */
+ if (virNetDevBridgePortSetLearning(brname, net->ifname, false) < 0)
+ goto cleanup;
+ if (virNetDevBridgePortSetUnicastFlood(brname, net->ifname, false) < 0)
+ goto cleanup;
+ }
+ } else {
+ if (qemuCreateInBridgePortWithHelper(cfg, brname,
+ &net->ifname,
+ tapfd, tap_create_flags) < 0) {
+ virDomainAuditNetDevice(def, net, tunpath, false);
+ goto cleanup;
+ }
+ /* qemuCreateInBridgePortWithHelper can only create a single FD */
+ if (*tapfdSize > 1) {
+ VIR_WARN("Ignoring multiqueue network request");
+ *tapfdSize = 1;
+ }
+ }
+
+ virDomainAuditNetDevice(def, net, tunpath, true);
+
+ if (cfg->macFilter &&
+ ebtablesAddForwardAllowIn(driver->ebtables,
+ net->ifname,
+ &net->mac) < 0)
+ goto cleanup;
+
+ if (net->filter &&
+ virDomainConfNWFilterInstantiate(def->uuid, net) < 0) {
+ goto cleanup;
+ }
+
+ ret = 0;
+
+ cleanup:
+ if (ret < 0) {
+ size_t i;
+ for (i = 0; i < *tapfdSize && tapfd[i] >= 0; i++)
+ VIR_FORCE_CLOSE(tapfd[i]);
+ if (template_ifname)
+ VIR_FREE(net->ifname);
+ }
+ virObjectUnref(cfg);
+
+ return ret;
+}
diff --git a/src/qemu/qemu_interface.h b/src/qemu/qemu_interface.h
index aa2791e..9cc7331 100644
--- a/src/qemu/qemu_interface.h
+++ b/src/qemu/qemu_interface.h
@@ -40,4 +40,10 @@ int qemuInterfacePhysicalConnect(virDomainDefPtr def,
size_t tapfdSize,
virNetDevVPortProfileOp vmop);
+int qemuInterfaceNetworkConnect(virDomainDefPtr def,
+ virQEMUDriverPtr driver,
+ virDomainNetDefPtr net,
+ int *tapfd,
+ size_t *tapfdSize)
+ ATTRIBUTE_NONNULL(2);
#endif /* __QEMU_INTERFACE_H__ */
--
2.5.0
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